99980123 has 2 divisors, whose sum is σ = 99980124. Its totient is φ = 99980122.

The previous prime is 99980087. The next prime is 99980137. The reversal of 99980123 is 32108999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99980123 - 2¹² = 99976027 is a prime.

It is not a weakly prime, because it can be changed into another prime (99980173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49990061 + 49990062.

It is an arithmetic number, because the mean of its divisors is an integer number (49990062).

Almost surely, 2^99980123 is an apocalyptic number.

99980123 is a deficient number, since it is larger than the sum of its proper divisors (1).

99980123 is an equidigital number, since it uses as much as digits as its factorization.

99980123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 99980123 is about 9999.0061006082. The cubic root of 99980123 is about 464.1281277030.

The spelling of 99980123 in words is "ninety-nine million, nine hundred eighty thousand, one hundred twenty-three".